Cancel Avast Premium and Buy Avast Ultimate

Just bought Avast Premium as I have the trial version of Avast Antivirus and the upgrade option takes you Premium.

Dug about abit more and would rather have bought Avast Ultimate as that comes with Cleanup and VPN.

How can i go about upgrading from Premium to Ultimate (without having to buy Ultimate at full price) ~ refund Premium and buy Ultimate?

Thanks,

Simon

You could try this link.

Sales change order details wrong email address given, etc. - Submit a support ticket https://support.avast.com/en-ww/contact/sales in your case select the Billing, payment, or license issues option - and then the I have a different billing or license issue and click Next and follow.